code: def setUp(self):
      super().setUp()
      test_utils.ensure_flag("test_tmpdir")
  
file_path: trax/trax/rl/actor_critic_joint_test.py
imports: import functools
  from absl.testing import absltest
  from trax import layers
  from trax import models
  from trax import optimizers
  from trax import test_utils
  from trax.rl import actor_critic_joint
  from trax.rl import task
  from trax.supervised import lr_schedules
label_desc: Use image node_id 1 for calling the ActorCriticJointTest obj's underlying member method code with example usage: obj.setUp() without return types